/*
 * Copyright (C) 2010 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * These authors would like to acknowledge the Spanish Ministry of Industry,
 * Tourism and Trade, for the support in the project TSI020301-2008-2
 * "PIRAmIDE: Personalizable Interactions with Resources on AmI-enabled
 * Mobile Dynamic Environments", led by Treelogic
 * ( http://www.treelogic.com/ ):
 *
 *   http://www.piramidepse.com/
 */

package com.google.zxing.oned.rss.expanded.decoders;

/**
 * @author Pablo Orduña, University of Deusto (pablo.orduna@deusto.es)
 */
final class CurrentParsingState {

    private int position;
    private State encoding;

    private enum State {
        NUMERIC,
        ALPHA,
        ISO_IEC_646
    }

    CurrentParsingState() {
        this.position = 0;
        this.encoding = State.NUMERIC;
    }

    int getPosition() {
        return position;
    }

    void setPosition(int position) {
        this.position = position;
    }

    void incrementPosition(int delta) {
        position += delta;
    }

    boolean isAlpha() {
        return this.encoding == State.ALPHA;
    }

    boolean isNumeric() {
        return this.encoding == State.NUMERIC;
    }

    boolean isIsoIec646() {
        return this.encoding == State.ISO_IEC_646;
    }

    void setNumeric() {
        this.encoding = State.NUMERIC;
    }

    void setAlpha() {
        this.encoding = State.ALPHA;
    }

    void setIsoIec646() {
        this.encoding = State.ISO_IEC_646;
    }
}
